function [ res ] = create_sample( mu, sigma)
%CREATE_SAMPLE creates a sample data from an input argumets
% mu - the expectation vector of the required sample
% sigma - the standard deviation of the required sample
%res - the resulted sample
%Precondition: mu and sigma are column vectors with the same dimensions 
[mu_r, mu_c] = size(mu);
res = randn(mu_r,1).*sigma + mu;
